#include<stdio.h>
main()
{
    int a=0,b=0,c=0,d=0,e=0,f=0,g=0,h=0;
    float x;
    x=0.00000001;
    while(x>0){
        x=x*10;
        if(x>1000){
            a=a+1;
            x=x-1000;
        }
        else if(x>500){
            b=b+1;
            x=x-500;
        }
        else if(x>200){
            c=c+1;
            x=x-200;
        }
        else if(x>100){
            d=d+1;
            x=x-100;
        }
        else if(x>50){
            e=e+1;
            x=x-50;
        }
        else if(x>10){
            f=f+1;
            x=x-10;
        }
        else if(x>5){
            g=g+1;
            x=x-5;
        }
        else if(x>1){
            h=h+1;
            x=x-1;
        }
        printf("100元：%d\n50元：%d\n20元：%d\n10元：%d\n5元：%d\n1元：%d\n5毛：%d\n1毛：%d\n",a,b,c,d,e,f,g,h);
    printf("请输入找零金额：");
    scanf("%f",&x);
    }
}

没有报错，但是计算结果不正确！

#include<stdio.h>
main()
{
    int a,b,c,d,e,f,g,h;
    float x;
    x=0.00000001;
    while(x>0){
        x=x*10;
        a=0,b=0,c=0,d=0,e=0,f=0,g=0,h=0;
        if(x>1000){
            a=a+1;
            x=x-1000;
        }
        else if(x>500){
            b=b+1;
            x=x-500;
        }
        else if(x>200){
            c=c+1;
            x=x-200;
        }
        else if(x>100){
            d=d+1;
            x=x-100;
        }
        else if(x>50){
            e=e+1;
            x=x-50;
        }
        else if(x>10){
            f=f+1;
            x=x-10;
        }
        else if(x>5){
            g=g+1;
            x=x-5;
        }
        else if(x>1){
            h=h+1;
            x=x-1;
        }
        printf("100元：%d\n50元：%d\n20元：%d\n10元：%d\n5元：%d\n1元：%d\n5毛：%d\n1毛：%d\n",a,b,c,d,e,f,g,h);
    printf("请输入找零金额：");
    scanf("%f",&x);
    }
}

最新修改后的 还是不对

你把具体的题发下。。我再看下 你的算法思路

你要什么样的计算结果啊？具体要求说说啊！

就是超市的找零钱程序

int total, pay;
cout << "请输入购买总额: ";
cin >> total;
cout << "请输入实付金额: ";
cin >> pay;
if ( pay < total )
{
  cout << "金额不足" << endl;
}
else
{
  int balance = pay - total;
  int m2000 = balance / 2000;
  int m1000 = balance % 2000 / 1000;
  int m500 = balance % 1000/ 500;
  int m100 = balance % 500 / 100;
  int m50 = balance % 100 / 50;
  int m10 = balance % 50 / 10;
  int m5 = balance % 10 / 5;
  int m1 = balance % 5;
}

#include<stdio.h>
main()
{
    int a,b,c,d,e,f,g,h;
    float x;
    x=0.00000001;
    while(x>0){
        x=x*10;
        a=0,b=0,c=0,d=0,e=0,f=0,g=0,h=0;
        printf("%f\n",x);
        a=(int)x/1000; //100
        b=(int)x%1000/500; //50
        c=(int)x%1000%500/200; //20
        d=(int)x%1000%500%200/100; //10
        e=(int)x%1000%500%200%100/50; //5
        f=(int)x%1000%500%200%100%50/10; //1
        g=(int)x%1000%500%200%100%50%10/5; //5ma
        f=(int)x%1000%500%200%100%50%10%5;
         
    printf("100元：%d\n50元：%d\n20元：%d\n10元：%d\n5元：%d\n1元：%d\n5毛：%d\n1毛：%d\n",a,b,c,d,e,f,g,h);
    printf("请输入找零金额：");
    scanf("%f",&x);
    }
}

a=(int)x/1000; //100
您这句话是什么意思呢？

把你的else if都改成while就ok了。
#include<stdio.h>
main()
{
    int a=0,b=0,c=0,d=0,e=0,f=0,g=0,h=0;
    float x;
    x=0.00000001;
    while(x>0){
        x=x*10;
        while(x>1000){
            a=a+1;
            x=x-1000;
        }
        while(x>500){
            b=b+1;
            x=x-500;
        }
        while(x>200){
            c=c+1;
            x=x-200;
        }
        while(x>100){
            d=d+1;
            x=x-100;
        }
        while(x>50){
            e=e+1;
            x=x-50;
        }
        while(x>10){
            f=f+1;
            x=x-10;
        }
        while(x>5){
            g=g+1;
            x=x-5;
        }
        while(x>1){
            h=h+1;
            x=x-1;
        }
        printf("100元：%d\n50元：%d\n20元：%d\n10元：%d\n5元：%d\n1元：%d\n5毛：%d\n1毛：%d\n",a,b,c,d,e,f,g,h);
    printf("请输入找零金额：");
    scanf("%f",&x);
    }
}